EP0674115A1 - Aus Platten unterschiedlicher Materialien zusammengebaute Scheibe für Bremsungen mit hohem Energieumsatz - Google Patents
Aus Platten unterschiedlicher Materialien zusammengebaute Scheibe für Bremsungen mit hohem Energieumsatz Download PDFInfo
- Publication number
- EP0674115A1 EP0674115A1 EP95400637A EP95400637A EP0674115A1 EP 0674115 A1 EP0674115 A1 EP 0674115A1 EP 95400637 A EP95400637 A EP 95400637A EP 95400637 A EP95400637 A EP 95400637A EP 0674115 A1 EP0674115 A1 EP 0674115A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- multimaterial
- braking
- ceramic
- central flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title abstract description 26
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- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 claims description 10
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- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
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- 229910002549 Fe–Cu Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
- F16D65/126—Discs; Drums for disc brakes characterised by the material used for the disc body the material being of low mechanical strength, e.g. carbon, beryllium; Torque transmitting members therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16D65/12—Discs; Drums for disc brakes
- F16D65/127—Discs; Drums for disc brakes characterised by properties of the disc surface; Discs lined with friction material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16D69/02—Composition of linings ; Methods of manufacturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1316—Structure radially segmented
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16D2065/13—Parts or details of discs or drums
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- F16D2065/13—Parts or details of discs or drums
- F16D2065/134—Connection
- F16D2065/1392—Connection elements
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- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/785—Heat insulation or reflection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
- F16D2069/006—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure comprising a heat-insulating layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
- F16D2200/003—Light metals, e.g. aluminium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
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- F16D2200/006—Materials; Production methods therefor containing fibres or particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D2250/00—Manufacturing; Assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16D2250/00—Manufacturing; Assembly
- F16D2250/0038—Surface treatment
- F16D2250/0046—Coating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0092—Tools or machines for producing linings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12486—Laterally noncoextensive components [e.g., embedded, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T428/21—Circular sheet or circular blank
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
- Y10T428/213—Frictional
Definitions
- the present invention relates to friction materials and their use in braking devices and relates, more particularly, to a multimaterial disc for high energy braking.
- the braking devices of the prior art use, for example, a clamp device requiring the use of brake discs generally mounted on the axle.
- brake pads bite the brake discs on either side of the disc itself.
- the energy to be dissipated is also important when the braking frequency is high, which is the case with metros.
- Braking devices of the prior art using, for example, brake discs for TGV-A and iron-copper sintered metal fittings are now reaching their limits.
- the braking devices of the prior art mounted on a high speed train dissipate an energy of the order of 14 MJ on each disc when braking is carried out from a speed of around 300 km / h.
- the maximum energy that can be dissipated is around 19 MJ.
- the current objectives in the braking field are to dissipate an energy of the order of 25 MJ on each disc when braking is carried out from a speed of the order of 400 km / h.
- Ceramic brakes are an interesting alternative. Ceramic materials generally have specific heats and high mechanical resistance at high temperature, good friction characteristics, and for some good resistance to thermal shock. Solid ceramics are, however, very fragile and do not allow a reliable solution to be envisaged via a one-piece braking disc. On the other hand, the ceramic coating or insert option seems more realistic from the point of view of reliability but also of costs. Thus, multi-material applications, such as ceramic coatings developed on disc by thermal spraying or discs composed of different assembled flanges as well as sintered ceramic linings, can be envisaged.
- An object of the present invention is therefore to propose a multimaterial disc for high energy braking for high speed trains using ceramic materials.
- the variants of the invention relate only to the disc which in all cases acts in conjunction with a ceramic lining as described in the state of the art.
- Another object of the present invention is to provide friction materials capable of being used in a brake disc and making it possible to limit the propagation of heat in the axle.
- Another object of the present invention is to provide friction materials capable of being used in a braking disc and making it possible to improve the wear resistance of the disc / lining pair.
- Another object of the present invention is to provide friction materials capable of being used in a braking disc and making it possible to improve the resistance of the disc to thermal fatigue while having stable friction characteristics at high temperature.
- cermet is the abbreviation for ceramic / metal and designates a ceramic-metal composite material.
- the subject of the invention is a multi-material disc for high energy braking, characterized in that it consists of different assembled flanges.
- the multi-material discs for high energy braking according to the invention are preferably associated with a brake lining comprising studs made of aluminum titanate or of another ceramic material.
- the pads of the brake lining mainly consist of around 54% alumina, around 33% titanium oxide, around 3% silica and of the order of 2.5% magnesium oxide.
- a first embodiment in accordance with the invention takes into account exclusively the "coating" aspect and relates to a projected disc, that is to say comprising coatings produced by thermal spraying.
- Plasma thermal spraying consists in introducing solid particles into a plasma jet in order to melt them before they come crashing down on the substrate where they form a deposit having a lamellar structure.
- Adaptation of a coating on a disc is not easy since it must have perfect adhesion to the substrate to properly fulfill its functions.
- the main difficulties are due to the nature of the chemical bonds between the ceramic and the substrate, to the intrinsic brittleness of the ceramics as well as to the differences in Young's modulus and coefficient of expansion between the projected deposit and the substrate.
- the liquid or semi-liquid particles are spread on the substrate. There is penetration of the liquid particles projected into the surface irregularities of the base material or of the previous particles, transfer of heat to the substrate, very rapid cooling and solidification by contraction of the particles.
- the adhesion and cohesion of the deposit are essentially of mechanical origin and the preparation of the substrate is one of the main phases on which the attachment of a deposit depends.
- the projection device used for the development is reproduced in FIG. 1.
- the multi-material disc 11 is rotated around its axis of revolution Y by means of rotation 13, at constant speed, while a torch 12, placed at the distance Dt from the disc, moves in a "back and forth" movement parallel to the x axis, symbolized by a double arrow 15, with a translation speed controlled by the radius of the disc 11 so as to obtain a coating thickness constant. It is imperative to control the projection parameters and the cooling of the disc 11, by cooling means 14, during the projection phase in order to minimize the residual stresses.
- a coating 21 of triplex type has been selected.
- a bonding layer 23 of NiCrAlY, a composite layer "yttria-zirconia-NiCrAlY" acting as a thermal barrier 24 and finally a friction layer 25 in cermet based on chromium carbide are thus deposited on a substrate 22.
- Such a structure of a multi-material disc (21) with a coating of the triplex type is for example shown in FIG. 2.
- the structure proposed in FIG. 2 relates to a steel substrate 22 and the compositions of the powders projected in this case are presented in table 1.
- the bonding underlayer 23 is not essential but makes it possible to increase the adhesion with the substrate 22 and with the upper deposit 24. Without a bonding sublayer 23, the adhesion is essentially mechanical while with a bonding sublayer 23, a small diffusion zone can be observed.
- the bonding alloys are materials which have increased resistance to oxidation and to corrosion, which makes it possible to limit the hot oxidation liable to develop in the event of heating during braking. This bonding layer also makes it possible to minimize the differences in coefficient of expansion between the substrate 22 and the second projected layer, namely the thermal barrier 24.
- Other alloys such as, for example, nickel aluminum can be used as bonding layer. but constitute a poorer oxidation barrier compared to an alloy of the MCrAlY type (where M: nickel or cobalt), more commonly used as an undercoat.
- Zirconia-based deposits are the most commonly used in industry as a thermal barrier, given their low thermal conductivity and their relatively high coefficient of thermal expansion.
- tests in the braking configuration have demonstrated the superior reliability of composite coatings which have much better adhesion to substrates and stronger cohesion.
- These are "metal-ceramic" composites of the NiCrAlY-zirconia type having mechanical characteristics clearly superior to that of zirconia while offering less sensitivity to thermal shock and an almost identical "thermal barrier efficiency" but the use of '' pure yttria zirconia or any other insulating oxide ceramic (aluminum titanate, alumina ...) is possible.
- a certain number of post-projection treatments may prove to be necessary to improve the lifespan of such devices, in particular in the case of braking generating extremely high energies.
- the use of a heat treatment in an inert environment (diffusion treatment) to release the residual stresses makes it possible to increase the adhesion by creating a diffusion zone at the interface underlay / substrate as well as at different interfaces in the case of multilayer coatings.
- a laser surface treatment can be performed to refuse a coating that has been previously deposited. It will also be noted that the reflow can be carried out by introducing into the densified deposit other particles of different nature, thus making it possible to obtain other characteristics on the surface (coefficient of friction more or less high for example).
- This treatment changes the microstructure of the deposits to make them denser and allows a lower residual stress state to be obtained.
- the surface reflow by laser makes it possible to obtain a dense, smooth coating on the surface, with a fine and homogeneous microstructure and having better thermomechanical properties. Under this layer of approximately 100 to 200 ⁇ m in thickness, the deposit remains as it is obtained after plasma spraying.
- the result of this treatment compared to "raw plasma" deposits, is an increase in wear resistance and better resistance to thermal shock.
- thermal barrier brake discs For application on high-speed trains, braking simulations on reduced steel discs 28CDV5-0.8 were carried out in conjunction with fittings in iron-copper sintered Jurid 721 type, materials used for TGV-A equipment, for reference.
- coated discs 0.1 mm sublayer + 0.5 mm thermal barrier + 0.5 mm friction layer
- the insertion of the thermal barrier logically generates a decrease in temperatures within the discs but also an increase in temperatures in the linings which then exhibit very severe wear.
- the optimization of a brake disc cannot be dissociated from that of the lining.
- the thermal barrier brake discs require the development of a new generation of lining.
- Ceramics have stable thermomechanical characteristics at high temperature and the use of linings of aluminum titanate associated with discs coated on the surface with nickel-chromium cermet / chromium carbide, makes it possible to obtain a remarkably stable coefficient of friction in the time, whatever the speed or the power considered and to distribute the heat generated at the interface more equitably.
- studs made of aluminum titanate were produced by isostatic pressing.
- the pads are mainly composed of 54% alumina, 33% titanium oxide, 3% silica and 2.5% magnesium oxide. This chemical composition can be modified to adjust the tribological behavior.
- ceramic studs are lighter and their manufacturing significantly less expensive.
- these friction materials lead, in the braking configuration, to lower and more regular wear compared to the torque "28CDV5 / lining Fe-Cu "sintered currently used.
- the wear mechanism by emission of debris is often followed by a phenomenon of high temperature glazing consisting of the formation of a very hard surface layer, thick From a micron point of view, from a practical point of view, the glazing gives the "nickel-chrome cermet / chromium carbide / aluminum titanate" couple good resistance to wear and a stable coefficient of friction.
- the current pads of the TGA-A fittings are sintered in mesh, then welded to a metal base, itself welded on the support sheet. In the case of ceramic studs, it is no longer possible to directly use the welding means for fixing them.
- FIG. 3 illustrates a possibility of fixing the pads 31 of a lining 30.
- a pad 31 is machined in a conventional manner in order to obtain a conical base.
- a centering foot 33 placed in housings 32 and 36, makes it possible to immobilize the rotating stud.
- a ring 34 in stainless steel for example, has internally a conical plane. This ring 34 is attached to the stud 31 and then welded to a support sheet 35 secured to a dovetail 37 fitting onto the application device (not shown) of the linings and allows the stud 31 to be fixed.
- the economic interest of this technology is appreciable.
- the railway or other material considered current brake discs have a relatively high cost.
- the TGV-A type discs are made of 28 CDV 5-0.8 steel, alloy steel grade with high elastic limit and are treated for a track hardness of 370 HB, which generates significant costs. .
- the economic advantage of the process lies in the fact that on the one hand expensive materials are used simply where they are needed and in the mass, a steel with average characteristics; on the other hand the coated discs can be recycled after wear by removing degraded deposits using special tools (coated tools for example) and by projecting new materials onto the disc thus recovered. It will be noted that it is difficult to envisage removing only the friction layer and that it is more reliable to produce the total coating again.
- a second embodiment in accordance with the invention relates to an attached disc which, as indicated above, makes it possible to combine and even improve the technical interests of the heat transfer level.
- This second embodiment consists in designing a disc made up of different assembled flanges. To use aluminum alloys under braking, it is necessary necessarily to remain at reasonable temperatures to preserve their mechanical characteristics even if they are composites with an aluminum matrix reinforced by fibers.
- the multi-material disc (40) consists of four parts.
- a central flange 41 is directly connected to the axle.
- Intermediate flanges 42 act as a thermal barrier and allow, by achieving a significant drop in temperature, the use of a central disc 41 of aluminum alloy.
- These insulating flanges 42 are made of sintered zirconia and therefore in solid form.
- Ceramic materials alumina, titanate
- alumina, titanate developed by conventional means (uni axial or isostatic pressing, casting, injection molding or even extrusion) could also be suitable.
- composite materials made up of a mixture of fibers often of alumina, and of organic binder, which like the massive ceramics elaborated by conventional way can be machined without difficulty and have, compared to the latter, clearly thermal conductivities. while providing resistance to thermal shock and equivalent thermomechanical properties.
- External flanges 43 consist of a steel substrate 44 coated, on one of its faces, with a nickel-chromium / chromium carbide cermet 45 possibly deposited on an undercoat. Acting in combination with linings (not shown) of aluminum titanate, these external flanges 43 allow to benefit from the advantages tribological (stability of the coefficient of friction, low and regular wear, possibility of adjusting the value of the coefficient of friction) described in the first embodiment.
- the thermal barrier further from the interface makes it possible, compared to the first embodiment, to limit the increase in temperatures of the friction surfaces and therefore the wear of the opposing materials.
- the thicknesses of the intermediate flanges 42, and of the external flanges 43, not coated, are to be optimized according to the intended braking application; the objective being to obtain a sufficiently large temperature drop at the interfaces 42/41 to allow the use of aluminum alloy while having a minimum temperature at the level of the rubbing surfaces.
- a variant allowing the use of two types of flanges can be envisaged by producing a thermal barrier 52 on a central flange 51 made of aluminum alloy by a deposition process.
- a thermal barrier 52 on a central flange 51 made of aluminum alloy by a deposition process.
- an external flange (53) composed of a substrate (54) comprising a coating (55) on one of its faces.
- Such a multi-material disc (50) is shown in Figure 5.
- the thickness of the thermal barrier is limited.
- the thickness of the thermal barrier thus produced may be insufficient and we can then envisage, from the production of a first thermal barrier 62A on a central flange 61, to produce a second thermal barrier 62B on an external flange 63.
- An embodiment of such a multimaterial disk (60) is shown in FIG. 6.
- the friction discs made up of attached flanges require a particular design.
- the description will carry on a friction disc 800 mounted on an axle 821 of a TGV-Atlantic type bogie carrier (Figs. 7 and 8).
- the intermediate 802 and external 803 flanges are attached to the central flange 801 before the latter is fixed to an axle 821 by means of a hub 820.
- the flanges 802, 803 opposite are held together by screws 813, self-locking nuts 812 at their base and, for example, by a system of clipped axes 806 and 808 at their external periphery.
- These flanges are rotated with the central flange 801 by means of keys 809 and 810 inserted between the flanges in housings.
- the hub 820 is sintered on the axle 821 and makes it possible to receive the friction disc 800 made up of the various flanges 801-803 assembled.
- the central flange 801 made of aluminum alloy is attached to the hub 820 by a heel assembly 818. This heel 818 engages under the axial stop 815 of the hub 820.
- a centering foot 819 is placed in a housing provided in the hub and used to immobilize in rotation the ring 814.
- the fixing of the central flange 801 in aluminum alloy on which are reported the other flanges 802, 803 is ensured by the screws 816 and the self-locking nuts 817.
- the ceramic sleeves 807 and 811 make it possible to isolate the external flanges 803 of friction from the central flange 801 made of aluminum alloy.
- the external flange 803 consists of a substrate 804 and a coating 805.
- the first embodiment requires that the entire coating be produced again in the event of reuse of the substrate.
- the "attached disc” design still allows the external flanges to be coated after preparation (machining to remove the degraded coating then sandblasting), but the thermal barrier is not to be carried out again.
- the intermediate flanges, which are more expensive to manufacture, and the central flange do not have to be changed.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Braking Arrangements (AREA)
- Ceramic Products (AREA)
- Coating By Spraying Or Casting (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9403536A FR2717874B1 (fr) | 1994-03-25 | 1994-03-25 | Disque multimatériaux pour freinage à haute énergie. |
FR9403536 | 1994-03-25 |
Publications (1)
Publication Number | Publication Date |
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EP0674115A1 true EP0674115A1 (de) | 1995-09-27 |
Family
ID=9461435
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95400636A Expired - Lifetime EP0674114B1 (de) | 1994-03-25 | 1995-03-22 | Aus unterschiedlichen Materialien bestehende Scheibe für Bremsungen mit hohem Energieumsatz |
EP95400637A Withdrawn EP0674115A1 (de) | 1994-03-25 | 1995-03-22 | Aus Platten unterschiedlicher Materialien zusammengebaute Scheibe für Bremsungen mit hohem Energieumsatz |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP95400636A Expired - Lifetime EP0674114B1 (de) | 1994-03-25 | 1995-03-22 | Aus unterschiedlichen Materialien bestehende Scheibe für Bremsungen mit hohem Energieumsatz |
Country Status (9)
Country | Link |
---|---|
US (2) | US5612110A (de) |
EP (2) | EP0674114B1 (de) |
JP (2) | JP3679445B2 (de) |
KR (2) | KR950031745A (de) |
CA (2) | CA2145466C (de) |
DE (1) | DE69514132T2 (de) |
ES (1) | ES2140633T3 (de) |
FR (1) | FR2717874B1 (de) |
TW (2) | TW281654B (de) |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0735293A1 (de) * | 1995-03-29 | 1996-10-02 | Usines Dehousse | Verfahren zur Befestigung eines Bremsscheibenstützkörpers am Rad eines Schienenfahrzeugs sowie mit wenigstens einem solchen Stützkörper versehenes Rad |
EP0777062A1 (de) * | 1995-12-01 | 1997-06-04 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Spannring zur Befestigung von Bremsscheiben, insbesondere Wellenbremsscheiben von Schienenfahrzeugen |
FR2745349A1 (fr) * | 1996-02-28 | 1997-08-29 | Usines Dehousse | Disque de frein modulaire |
WO1997041368A1 (en) * | 1996-05-02 | 1997-11-06 | The Dow Chemical Company | Ceramic metal composite brake components and manufacture thereof |
DE102009003161A1 (de) | 2009-05-15 | 2010-11-18 | Ford Global Technologies, LLC, Dearborn | Beschichtete Leichtmetallscheibe und Verfahren zu deren Herstellung |
WO2019057472A1 (de) * | 2017-09-20 | 2019-03-28 | Saf-Holland Gmbh | Mehrteilige bremsscheibe |
Also Published As
Publication number | Publication date |
---|---|
DE69514132D1 (de) | 2000-02-03 |
ES2140633T3 (es) | 2000-03-01 |
DE69514132T2 (de) | 2000-08-31 |
EP0674114B1 (de) | 1999-12-29 |
FR2717874A1 (fr) | 1995-09-29 |
US5612110A (en) | 1997-03-18 |
KR950033165A (ko) | 1995-12-22 |
CA2145467C (fr) | 2004-11-30 |
JP3679445B2 (ja) | 2005-08-03 |
CA2145466A1 (fr) | 1995-09-26 |
TW281654B (de) | 1996-07-21 |
JPH07269615A (ja) | 1995-10-20 |
CA2145466C (fr) | 2004-11-30 |
FR2717874B1 (fr) | 1996-04-26 |
CA2145467A1 (fr) | 1995-09-26 |
EP0674114A1 (de) | 1995-09-27 |
KR950031745A (ko) | 1995-12-20 |
US5629101A (en) | 1997-05-13 |
JP3679444B2 (ja) | 2005-08-03 |
JPH07269614A (ja) | 1995-10-20 |
KR100344596B1 (ko) | 2002-10-31 |
TW275607B (de) | 1996-05-11 |
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